Question

Lemon juice has a pH 2, what is the
concentration of H+ ions?

Answer 1

Answer: $10^{-2}M$

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7.

$pH=-\log [H^+]$

$pOH=-\log[OH^-]$

Putting in the values:

$2=-\log[H^+]$

$[H^+]=antilog(2)=10^{-2}$

Thus the  concentration of $H^+$ ions are $10^{-2}M$

Answer 2

Answer:pH = -log (H+)

-pH = log (H+)

(H+)=10^-pH

=10^-2

=0.01 moles/litre

Explanation: